lost its greatest son. >> reporter: shortly after president obama offered condolences. >> we have lost an influential courageous human being. >> reporter: a small corner of the country where he made a difference. he joined the congress in his country with the anc formed a resistance. he was charged with treason and life in prison. he was in one of the most remote and harsh african prisons. he was freed at 71. within a few yearsar par years apartheid ended. in 2010 south africa welcomed the first world cup. >>> a freeze warning still in effect across the bay area. this morning people bundled up. this video from the east bay, but it was like that much of the bay area. it will be a little warmer, by that we mean a little warmer. jacqueline, how is it looking now? >> reporter: very very cold, pam. there are already sub freezing temperatures. it is 28 in santa rosa. 30 in vallejo. over toward livermore 29. south bay is 30s. 36 in half moon bay. 35 in san mateo. it will only get colder. widespread frost. on your car wind shield, there could even be black ice. we will stay that way overnight.